/*
* Copyright (C) 2003-2014 Free Software Foundation, Inc.
* Copyright (C) 2015-2016 Red Hat, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
#include "gnutls_int.h"
#include <libtasn1.h>
#include <datum.h>
#include <global.h>
#include "errors.h"
#include <str.h>
#include <x509.h>
#include <num.h>
#include <x509_b64.h>
#include <c-strcase.h>
#include "x509_int.h"
#include "extras/hex.h"
#include <common.h>
static int
data2hex(const void *data, size_t data_size,
gnutls_datum_t *out);
#define ENTRY(oid, ldap, asn, etype) {oid, sizeof(oid)-1, ldap, sizeof(ldap)-1, asn, etype}
/* when there is no name description */
#define ENTRY_ND(oid, asn, etype) {oid, sizeof(oid)-1, NULL, 0, asn, etype}
/* This list contains all the OIDs that may be
* contained in a rdnSequence and are printable.
*/
static const struct oid_to_string _oid2str[] = {
/* PKIX
*/
ENTRY("1.3.6.1.5.5.7.9.2", "placeOfBirth", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("1.3.6.1.5.5.7.9.3", "gender", NULL, ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("1.3.6.1.5.5.7.9.4", "countryOfCitizenship", NULL,
ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("1.3.6.1.5.5.7.9.5", "countryOfResidence", NULL,
ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("2.5.4.6", "C", NULL, ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("2.5.4.9", "street", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.12", "title", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.10", "O", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.11", "OU", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.3", "CN", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.7", "L", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.8", "ST", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.13", "description", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.5", "serialNumber", NULL, ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("2.5.4.20", "telephoneNumber", NULL, ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("2.5.4.4", "surName", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.43", "initials", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.44", "generationQualifier", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.42", "givenName", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.65", "pseudonym", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.46", "dnQualifier", NULL, ASN1_ETYPE_PRINTABLE_STRING),
ENTRY("2.5.4.17", "postalCode", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("2.5.4.41", "name", "PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("2.5.4.15", "businessCategory", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("0.9.2342.19200300.100.1.25", "DC", NULL, ASN1_ETYPE_IA5_STRING),
ENTRY("0.9.2342.19200300.100.1.1", "UID", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
ENTRY("1.2.840.113556.1.4.656", "userPrincipalName", "PKIX1.DirectoryString",
ASN1_ETYPE_INVALID),
/* Extended validation
*/
ENTRY("1.3.6.1.4.1.311.60.2.1.1",
"jurisdictionOfIncorporationLocalityName",
"PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("1.3.6.1.4.1.311.60.2.1.2",
"jurisdictionOfIncorporationStateOrProvinceName",
"PKIX1.DirectoryString", ASN1_ETYPE_INVALID),
ENTRY("1.3.6.1.4.1.311.60.2.1.3",
"jurisdictionOfIncorporationCountryName",
NULL, ASN1_ETYPE_PRINTABLE_STRING),
/* PKCS #9
*/
ENTRY("1.2.840.113549.1.9.1", "EMAIL", NULL, ASN1_ETYPE_IA5_STRING),
ENTRY_ND("1.2.840.113549.1.9.7", "PKIX1.pkcs-9-challengePassword",
ASN1_ETYPE_INVALID),
/* friendly name */
ENTRY_ND("1.2.840.113549.1.9.20", NULL, ASN1_ETYPE_BMP_STRING),
/* local key id */
ENTRY_ND("1.2.840.113549.1.9.21", NULL, ASN1_ETYPE_OCTET_STRING),
ENTRY_ND("1.2.840.113549.1.9.4", NULL, ASN1_ETYPE_OCTET_STRING),
/* rfc3920 section 5.1.1 */
ENTRY("1.3.6.1.5.5.7.8.5", "XmppAddr", NULL, ASN1_ETYPE_UTF8_STRING),
/* Russian things: https://cdnimg.rg.ru/pril/66/91/91/23041_pril.pdf */
/* Main state registration number */
ENTRY("1.2.643.100.1", "OGRN", NULL, ASN1_ETYPE_NUMERIC_STRING),
/* Individual insurance account number */
ENTRY("1.2.643.100.3", "SNILS", NULL, ASN1_ETYPE_NUMERIC_STRING),
/* Main state registration number for individual enterpreneurs */
ENTRY("1.2.643.100.5", "OGRNIP", NULL, ASN1_ETYPE_NUMERIC_STRING),
/* VAT identification number */
ENTRY("1.2.643.3.131.1.1", "INN", NULL, ASN1_ETYPE_NUMERIC_STRING),
{NULL, 0, NULL, 0, NULL, 0}
};
const struct oid_to_string *_gnutls_oid_get_entry(const struct oid_to_string *ots, const char *oid)
{
unsigned int i = 0;
unsigned len = strlen(oid);
do {
if (len == ots[i].oid_size &&
strcmp(ots[i].oid, oid) == 0)
return &ots[i];
i++;
}
while (ots[i].oid != NULL);
return NULL;
}
const char *_gnutls_ldap_string_to_oid(const char *str, unsigned str_len)
{
unsigned int i = 0;
do {
if ((_oid2str[i].name_desc != NULL) &&
(str_len == _oid2str[i].name_desc_size) &&
(c_strncasecmp(_oid2str[i].name_desc, str, str_len) ==
0))
return _oid2str[i].oid;
i++;
}
while (_oid2str[i].oid != NULL);
return NULL;
}
/* Escapes a string following the rules from RFC4514.
*/
static int str_escape(const gnutls_datum_t * str, gnutls_datum_t * escaped)
{
unsigned int j, i;
uint8_t *buffer = NULL;
int ret;
if (str == NULL)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
/* the string will be at most twice the original */
buffer = gnutls_malloc(str->size * 2 + 2);
if (buffer == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
for (i = j = 0; i < str->size; i++) {
if (str->data[i] == 0) {
/* this is handled earlier */
ret = gnutls_assert_val(GNUTLS_E_ASN1_DER_ERROR);
goto cleanup;
}
if (str->data[i] == ',' || str->data[i] == '+'
|| str->data[i] == '"' || str->data[i] == '\\'
|| str->data[i] == '<' || str->data[i] == '>'
|| str->data[i] == ';' || str->data[i] == 0)
buffer[j++] = '\\';
else if (i == 0 && str->data[i] == '#')
buffer[j++] = '\\';
else if (i == 0 && str->data[i] == ' ')
buffer[j++] = '\\';
else if (i == (str->size - 1) && str->data[i] == ' ')
buffer[j++] = '\\';
buffer[j++] = str->data[i];
}
/* null terminate the string */
buffer[j] = 0;
escaped->data = buffer;
escaped->size = j;
return 0;
cleanup:
gnutls_free(buffer);
return ret;
}
/**
* gnutls_x509_dn_oid_known:
* @oid: holds an Object Identifier in a null terminated string
*
* This function will inform about known DN OIDs. This is useful since
* functions like gnutls_x509_crt_set_dn_by_oid() use the information
* on known OIDs to properly encode their input. Object Identifiers
* that are not known are not encoded by these functions, and their
* input is stored directly into the ASN.1 structure. In that case of
* unknown OIDs, you have the responsibility of DER encoding your
* data.
*
* Returns: 1 on known OIDs and 0 otherwise.
**/
int gnutls_x509_dn_oid_known(const char *oid)
{
return _gnutls_oid_get_entry(_oid2str, oid) != NULL;
}
/**
* gnutls_x509_dn_oid_name:
* @oid: holds an Object Identifier in a null terminated string
* @flags: 0 or GNUTLS_X509_DN_OID_*
*
* This function will return the name of a known DN OID. If
* %GNUTLS_X509_DN_OID_RETURN_OID is specified this function
* will return the given OID if no descriptive name has been
* found.
*
* Returns: A null terminated string or NULL otherwise.
*
* Since: 3.0
**/
const char *gnutls_x509_dn_oid_name(const char *oid, unsigned int flags)
{
const struct oid_to_string *entry =_gnutls_oid_get_entry(_oid2str, oid);
if (entry && entry->name_desc)
return entry->name_desc;
if (flags & GNUTLS_X509_DN_OID_RETURN_OID)
return oid;
else
return NULL;
}
static int
make_printable_string(unsigned etype, const gnutls_datum_t * input,
gnutls_datum_t * out)
{
int printable = 0;
int ret;
/* empty input strings result to a null string */
if (input->data == NULL || input->size == 0) {
out->data = gnutls_calloc(1, 1);
if (out->data == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
out->size = 0;
return 0;
}
if (etype == ASN1_ETYPE_BMP_STRING) {
ret = _gnutls_ucs2_to_utf8(input->data, input->size, out, 1);
if (ret < 0) {
/* could not convert. Handle it as non-printable */
printable = 0;
} else
printable = 1;
} else if (etype == ASN1_ETYPE_TELETEX_STRING) {
/* HACK: if the teletex string contains only ascii
* characters then treat it as printable.
*/
if (_gnutls_str_is_print((char*)input->data, input->size)) {
out->data = gnutls_malloc(input->size + 1);
if (out->data == NULL)
return
gnutls_assert_val
(GNUTLS_E_MEMORY_ERROR);
memcpy(out->data, input->data, input->size);
out->size = input->size;
out->data[out->size] = 0;
printable = 1;
}
} else if (etype != ASN1_ETYPE_UNIVERSAL_STRING) /* supported but not printable */
return GNUTLS_E_INVALID_REQUEST;
if (printable == 0) { /* need to allocate out */
ret = data2hex(input->data, input->size, out);
if (ret < 0) {
gnutls_assert();
return ret;
}
}
return 0;
}
static int
decode_complex_string(const struct oid_to_string *oentry, void *value,
int value_size, gnutls_datum_t * out)
{
char str[MAX_STRING_LEN], tmpname[128];
int len = -1, result;
ASN1_TYPE tmpasn = ASN1_TYPE_EMPTY;
char asn1_err[ASN1_MAX_ERROR_DESCRIPTION_SIZE] = "";
unsigned int etype;
gnutls_datum_t td = {NULL, 0};
if (oentry->asn_desc == NULL) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
if ((result =
asn1_create_element(_gnutls_get_pkix(), oentry->asn_desc,
&tmpasn)) != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
if ((result =
_asn1_strict_der_decode(&tmpasn, value, value_size,
asn1_err)) != ASN1_SUCCESS) {
gnutls_assert();
_gnutls_debug_log("_asn1_strict_der_decode: %s\n", asn1_err);
asn1_delete_structure(&tmpasn);
return _gnutls_asn2err(result);
}
/* Read the type of choice.
*/
len = sizeof(str) - 1;
if ((result = asn1_read_value(tmpasn, "", str, &len)) != ASN1_SUCCESS) { /* CHOICE */
gnutls_assert();
asn1_delete_structure(&tmpasn);
return _gnutls_asn2err(result);
}
str[len] = 0;
/* We set the etype on the strings that may need
* some conversion to UTF-8. The INVALID flag indicates
* no conversion needed */
if (strcmp(str, "teletexString") == 0)
etype = ASN1_ETYPE_TELETEX_STRING;
else if (strcmp(str, "bmpString") == 0)
etype = ASN1_ETYPE_BMP_STRING;
else if (strcmp(str, "universalString") == 0)
etype = ASN1_ETYPE_UNIVERSAL_STRING;
else
etype = ASN1_ETYPE_INVALID;
_gnutls_str_cpy(tmpname, sizeof(tmpname), str);
result = _gnutls_x509_read_value(tmpasn, tmpname, &td);
asn1_delete_structure(&tmpasn);
if (result < 0)
return gnutls_assert_val(result);
if (etype != ASN1_ETYPE_INVALID) {
result = make_printable_string(etype, &td, out);
_gnutls_free_datum(&td);
if (result < 0)
return gnutls_assert_val(result);
} else {
out->data = td.data;
out->size = td.size;
/* _gnutls_x509_read_value always null terminates */
}
assert(out->data != NULL);
/* Refuse to deal with strings containing NULs. */
if (strlen((void *) out->data) != (size_t) out->size) {
_gnutls_free_datum(out);
return gnutls_assert_val(GNUTLS_E_ASN1_EMBEDDED_NULL_IN_STRING);
}
return 0;
}
/* This function will convert an attribute value, specified by the OID,
* to a string. The result will be a null terminated string.
*
* res may be null. This will just return the res_size, needed to
* hold the string.
*/
int
_gnutls_x509_dn_to_string(const char *oid, void *value,
int value_size, gnutls_datum_t * str)
{
const struct oid_to_string *oentry;
int ret;
gnutls_datum_t tmp = {NULL, 0};
if (value == NULL || value_size <= 0) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
oentry = _gnutls_oid_get_entry(_oid2str, oid);
if (oentry == NULL) { /* unknown OID -> hex */
unknown_oid:
ret = data2hex(value, value_size, str);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
if (oentry->asn_desc != NULL) { /* complex */
ret =
decode_complex_string(oentry, value, value_size, &tmp);
if (ret < 0) {
/* we failed decoding -> handle it as unknown OID */
goto unknown_oid;
}
} else {
ret =
_gnutls_x509_decode_string(oentry->etype, value,
value_size, &tmp, 0);
if (ret < 0) {
/* we failed decoding -> handle it as unknown OID */
goto unknown_oid;
}
}
ret = str_escape(&tmp, str);
_gnutls_free_datum(&tmp);
if (ret < 0)
return gnutls_assert_val(ret);
return 0;
}
/* Converts a data string to an LDAP rfc2253 hex string
* something like '#01020304'
*/
static int
data2hex(const void *data, size_t data_size,
gnutls_datum_t *out)
{
gnutls_datum_t tmp, td;
int ret;
size_t size;
td.size = hex_str_size(data_size) + 1; /* +1 for '#' */
td.data = gnutls_malloc(td.size);
if (td.data == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
tmp.data = (void*)data;
tmp.size = data_size;
td.data[0] = '#';
size = td.size-1; /* don't include '#' */
ret =
gnutls_hex_encode(&tmp,
(char*)&td.data[1], &size);
if (ret < 0) {
gnutls_assert();
gnutls_free(td.data);
return GNUTLS_E_SHORT_MEMORY_BUFFER;
}
td.size--; /* don't include null */
out->data = td.data;
out->size = td.size;
return 0;
}
gnutls_x509_subject_alt_name_t _gnutls_x509_san_find_type(char *str_type)
{
if (strcmp(str_type, "dNSName") == 0)
return GNUTLS_SAN_DNSNAME;
if (strcmp(str_type, "rfc822Name") == 0)
return GNUTLS_SAN_RFC822NAME;
if (strcmp(str_type, "uniformResourceIdentifier") == 0)
return GNUTLS_SAN_URI;
if (strcmp(str_type, "iPAddress") == 0)
return GNUTLS_SAN_IPADDRESS;
if (strcmp(str_type, "otherName") == 0)
return GNUTLS_SAN_OTHERNAME;
if (strcmp(str_type, "directoryName") == 0)
return GNUTLS_SAN_DN;
if (strcmp(str_type, "registeredID") == 0)
return GNUTLS_SAN_REGISTERED_ID;
return (gnutls_x509_subject_alt_name_t) - 1;
}
/* A generic export function. Will export the given ASN.1 encoded data
* to PEM or DER raw data.
*/
int
_gnutls_x509_export_int_named(ASN1_TYPE asn1_data, const char *name,
gnutls_x509_crt_fmt_t format,
const char *pem_header,
unsigned char *output_data,
size_t * output_data_size)
{
int ret;
gnutls_datum_t out = {NULL,0};
size_t size;
ret = _gnutls_x509_export_int_named2(asn1_data, name,
format, pem_header, &out);
if (ret < 0)
return gnutls_assert_val(ret);
if (format == GNUTLS_X509_FMT_PEM)
size = out.size + 1;
else
size = out.size;
if (*output_data_size < size) {
*output_data_size = size;
ret = gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
goto cleanup;
}
*output_data_size = (size_t) out.size;
if (output_data) {
memcpy(output_data, out.data, (size_t) out.size);
if (format == GNUTLS_X509_FMT_PEM)
output_data[out.size] = 0;
}
ret = 0;
cleanup:
gnutls_free(out.data);
return ret;
}
/* A generic export function. Will export the given ASN.1 encoded data
* to PEM or DER raw data.
*/
int
_gnutls_x509_export_int_named2(ASN1_TYPE asn1_data, const char *name,
gnutls_x509_crt_fmt_t format,
const char *pem_header,
gnutls_datum_t * out)
{
int ret;
if (format == GNUTLS_X509_FMT_DER) {
ret = _gnutls_x509_der_encode(asn1_data, name, out, 0);
if (ret < 0)
return gnutls_assert_val(ret);
} else { /* PEM */
gnutls_datum_t tmp;
ret = _gnutls_x509_der_encode(asn1_data, name, &tmp, 0);
if (ret < 0)
return gnutls_assert_val(ret);
ret =
_gnutls_fbase64_encode(pem_header, tmp.data, tmp.size,
out);
_gnutls_free_datum(&tmp);
if (ret < 0)
return gnutls_assert_val(ret);
}
return 0;
}
/* Decodes an octet string. The etype specifies the string type.
* The returned string is always null terminated (but null is not
* included in size).
*/
int
_gnutls_x509_decode_string(unsigned int etype,
const uint8_t * der, size_t der_size,
gnutls_datum_t * output, unsigned allow_ber)
{
int ret;
uint8_t *str;
unsigned int str_size, len;
gnutls_datum_t td;
output->data = NULL;
output->size = 0;
if (allow_ber)
ret =
asn1_decode_simple_ber(etype, der, der_size, &str, &str_size, NULL);
else
ret =
asn1_decode_simple_der(etype, der, der_size, (const uint8_t**)&str, &str_size);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(ret);
return ret;
}
td.size = str_size;
td.data = gnutls_malloc(str_size + 1);
if (td.data == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
memcpy(td.data, str, str_size);
td.data[str_size] = 0;
if (allow_ber)
free(str);
ret = make_printable_string(etype, &td, output);
if (ret == GNUTLS_E_INVALID_REQUEST) { /* unsupported etype */
output->data = td.data;
output->size = td.size;
ret = 0;
} else if (ret <= 0) {
_gnutls_free_datum(&td);
}
/* Refuse to deal with strings containing NULs. */
if (etype != ASN1_ETYPE_OCTET_STRING) {
if (output->data)
len = strlen((void *) output->data);
else
len = 0;
if (len != (size_t) output->size) {
_gnutls_free_datum(output);
ret = gnutls_assert_val(GNUTLS_E_ASN1_EMBEDDED_NULL_IN_STRING);
}
}
return ret;
}
/* Reads a value from an ASN1 tree, and puts the output
* in an allocated variable in the given datum.
*
* Note that this function always allocates one plus
* the required data size (and places a null byte).
*/
static int
x509_read_value(ASN1_TYPE c, const char *root,
gnutls_datum_t * ret, unsigned allow_null)
{
int len = 0, result;
uint8_t *tmp = NULL;
unsigned int etype;
result = asn1_read_value_type(c, root, NULL, &len, &etype);
if (result == 0 && allow_null == 0 && len == 0) {
/* don't allow null strings */
return gnutls_assert_val(GNUTLS_E_ASN1_DER_ERROR);
} else if (result == 0 && allow_null == 0 && etype == ASN1_ETYPE_OBJECT_ID && len == 1) {
return gnutls_assert_val(GNUTLS_E_ASN1_DER_ERROR);
}
if (result != ASN1_MEM_ERROR) {
if (result != ASN1_SUCCESS || allow_null == 0 || len != 0) {
result = _gnutls_asn2err(result);
return result;
}
}
if (etype == ASN1_ETYPE_BIT_STRING) {
len = (len + 7)/8;
}
tmp = gnutls_malloc((size_t) len + 1);
if (tmp == NULL) {
gnutls_assert();
result = GNUTLS_E_MEMORY_ERROR;
goto cleanup;
}
if (len > 0) {
result = asn1_read_value(c, root, tmp, &len);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
if (etype == ASN1_ETYPE_BIT_STRING) {
ret->size = (len+7) / 8;
} else {
ret->size = (unsigned) len;
}
} else {
ret->size = 0;
}
tmp[ret->size] = 0;
ret->data = tmp;
return 0;
cleanup:
gnutls_free(tmp);
return result;
}
int
_gnutls_x509_read_value(ASN1_TYPE c, const char *root,
gnutls_datum_t * ret)
{
return x509_read_value(c, root, ret, 0);
}
int
_gnutls_x509_read_null_value(ASN1_TYPE c, const char *root,
gnutls_datum_t * ret)
{
return x509_read_value(c, root, ret, 1);
}
/* Reads a value from an ASN1 tree, then interprets it as the provided
* type of string and returns the output in an allocated variable.
*
* Note that this function always places a null character
* at the end of a readable string value (which is not accounted into size)
*/
int
_gnutls_x509_read_string(ASN1_TYPE c, const char *root,
gnutls_datum_t * ret, unsigned int etype, unsigned int allow_ber)
{
int len = 0, result;
size_t slen;
uint8_t *tmp = NULL;
unsigned rtype;
result = asn1_read_value_type(c, root, NULL, &len, &rtype);
if (result != ASN1_MEM_ERROR) {
gnutls_assert();
result = _gnutls_asn2err(result);
return result;
}
if (rtype == ASN1_ETYPE_BIT_STRING)
len /= 8;
tmp = gnutls_malloc((size_t) len + 1);
if (tmp == NULL) {
gnutls_assert();
result = GNUTLS_E_MEMORY_ERROR;
goto cleanup;
}
result = asn1_read_value(c, root, tmp, &len);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
if (rtype == ASN1_ETYPE_BIT_STRING)
len /= 8;
/* Extract the STRING.
*/
slen = (size_t) len;
result = _gnutls_x509_decode_string(etype, tmp, slen, ret, allow_ber);
if (result < 0) {
gnutls_assert();
goto cleanup;
}
gnutls_free(tmp);
return 0;
cleanup:
gnutls_free(tmp);
return result;
}
/* The string type should be IA5String, UTF8String etc. Leave
* null for octet string */
int _gnutls_x509_encode_string(unsigned int etype,
const void *input_data, size_t input_size,
gnutls_datum_t * output)
{
uint8_t tl[ASN1_MAX_TL_SIZE];
unsigned int tl_size;
int ret;
tl_size = sizeof(tl);
ret =
asn1_encode_simple_der(etype, input_data, input_size, tl,
&tl_size);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(ret);
return ret;
}
output->data = gnutls_malloc(tl_size + input_size);
if (output->data == NULL)
return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);
memcpy(output->data, tl, tl_size);
memcpy(output->data + tl_size, input_data, input_size);
output->size = tl_size + input_size;
return 0;
}
/* DER Encodes the src ASN1_TYPE and stores it to
* the given datum. If str is non zero then the data are encoded as
* an OCTET STRING.
*/
int
_gnutls_x509_der_encode(ASN1_TYPE src, const char *src_name,
gnutls_datum_t * res, int str)
{
int size, result;
int asize;
uint8_t *data = NULL;
ASN1_TYPE c2 = ASN1_TYPE_EMPTY;
size = 0;
result = asn1_der_coding(src, src_name, NULL, &size, NULL);
/* this check explicitly covers the case where size == 0 && result == 0 */
if (result != ASN1_MEM_ERROR) {
gnutls_assert();
return _gnutls_asn2err(result);
}
/* allocate data for the der
*/
if (str)
size += 16; /* for later to include the octet tags */
asize = size;
data = gnutls_malloc((size_t) size);
if (data == NULL) {
gnutls_assert();
return GNUTLS_E_MEMORY_ERROR;
}
result = asn1_der_coding(src, src_name, data, &size, NULL);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
if (str) {
if ((result = asn1_create_element
(_gnutls_get_pkix(), "PKIX1.pkcs-7-Data",
&c2)) != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
result = asn1_write_value(c2, "", data, size);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
result = asn1_der_coding(c2, "", data, &asize, NULL);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
size = asize;
asn1_delete_structure(&c2);
}
res->data = data;
res->size = (unsigned) size;
return 0;
cleanup:
gnutls_free(data);
asn1_delete_structure(&c2);
return result;
}
/* DER Encodes the src ASN1_TYPE and stores it to
* dest in dest_name. Useful to encode something and store it
* as OCTET. If str is non null then the data are encoded as
* an OCTET STRING.
*/
int
_gnutls_x509_der_encode_and_copy(ASN1_TYPE src, const char *src_name,
ASN1_TYPE dest, const char *dest_name,
int str)
{
int result;
gnutls_datum_t encoded = {NULL, 0};
result = _gnutls_x509_der_encode(src, src_name, &encoded, str);
if (result < 0) {
gnutls_assert();
return result;
}
/* Write the data.
*/
result =
asn1_write_value(dest, dest_name, encoded.data,
(int) encoded.size);
_gnutls_free_datum(&encoded);
if (result != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
return 0;
}
/* Writes the value of the datum in the given ASN1_TYPE.
*/
int
_gnutls_x509_write_value(ASN1_TYPE c, const char *root,
const gnutls_datum_t * data)
{
int ret;
/* Write the data.
*/
ret = asn1_write_value(c, root, data->data, data->size);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(ret);
}
return 0;
}
/* Writes the value of the datum in the given ASN1_TYPE as a string.
*/
int
_gnutls_x509_write_string(ASN1_TYPE c, const char *root,
const gnutls_datum_t * data, unsigned int etype)
{
int ret;
gnutls_datum_t val = { NULL, 0 };
ret =
_gnutls_x509_encode_string(etype, data->data, data->size,
&val);
if (ret < 0)
return gnutls_assert_val(ret);
/* Write the data.
*/
ret = asn1_write_value(c, root, val.data, val.size);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(ret);
goto cleanup;
}
ret = 0;
cleanup:
_gnutls_free_datum(&val);
return ret;
}
void
_asnstr_append_name(char *name, size_t name_size, const char *part1,
const char *part2)
{
if (part1[0] != 0) {
_gnutls_str_cpy(name, name_size, part1);
_gnutls_str_cat(name, name_size, part2);
} else
_gnutls_str_cpy(name, name_size,
part2 + 1 /* remove initial dot */ );
}
/* Encodes and copies the private key parameters into a
* subjectPublicKeyInfo structure.
*
*/
int
_gnutls_x509_encode_and_copy_PKI_params(ASN1_TYPE dst,
const char *dst_name,
const gnutls_pk_params_st * params)
{
const char *oid;
gnutls_datum_t der = { NULL, 0 };
int result;
char name[128];
oid = gnutls_pk_get_oid(params->algo);
if (oid == NULL) {
gnutls_assert();
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
/* write the OID
*/
_asnstr_append_name(name, sizeof(name), dst_name,
".algorithm.algorithm");
result = asn1_write_value(dst, name, oid, 1);
if (result != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
result =
_gnutls_x509_write_pubkey_params(params, &der);
if (result < 0) {
gnutls_assert();
return result;
}
_asnstr_append_name(name, sizeof(name), dst_name,
".algorithm.parameters");
result = asn1_write_value(dst, name, der.data, der.size);
_gnutls_free_datum(&der);
if (result != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
result = _gnutls_x509_write_pubkey(params, &der);
if (result < 0) {
gnutls_assert();
return result;
}
/* Write the DER parameters. (in bits)
*/
_asnstr_append_name(name, sizeof(name), dst_name,
".subjectPublicKey");
result = asn1_write_value(dst, name, der.data, der.size * 8);
_gnutls_free_datum(&der);
if (result != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
return 0;
}
/* Encodes and public key parameters into a
* subjectPublicKeyInfo structure and stores it in der.
*/
int
_gnutls_x509_encode_PKI_params(gnutls_datum_t * der,
const gnutls_pk_params_st * params)
{
int ret;
ASN1_TYPE tmp;
ret = asn1_create_element(_gnutls_get_pkix(),
"PKIX1.Certificate", &tmp);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(ret);
}
ret = _gnutls_x509_encode_and_copy_PKI_params(tmp,
"tbsCertificate.subjectPublicKeyInfo",
params);
if (ret != ASN1_SUCCESS) {
gnutls_assert();
ret = _gnutls_asn2err(ret);
goto cleanup;
}
ret =
_gnutls_x509_der_encode(tmp,
"tbsCertificate.subjectPublicKeyInfo",
der, 0);
cleanup:
asn1_delete_structure(&tmp);
return ret;
}
/* Reads and returns the PK algorithm of the given certificate-like
* ASN.1 structure. src_name should be something like "tbsCertificate.subjectPublicKeyInfo".
*/
int
_gnutls_x509_get_pk_algorithm(ASN1_TYPE src, const char *src_name,
gnutls_ecc_curve_t *curve,
unsigned int *bits)
{
int result;
int algo;
char oid[64];
int len;
gnutls_ecc_curve_t lcurve = GNUTLS_ECC_CURVE_INVALID;
char name[128];
_asnstr_append_name(name, sizeof(name), src_name,
".algorithm.algorithm");
len = sizeof(oid);
result = asn1_read_value(src, name, oid, &len);
if (result != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
algo = _gnutls_oid_to_pk_and_curve(oid, &lcurve);
if (algo == GNUTLS_PK_UNKNOWN) {
_gnutls_debug_log
("%s: unknown public key algorithm: %s\n", __func__,
oid);
}
if (curve)
*curve = lcurve;
if (bits == NULL) {
return algo;
}
/* Now read the parameters' bits
*/
if (lcurve != GNUTLS_ECC_CURVE_INVALID) { /* curve present */
bits[0] = gnutls_ecc_curve_get_size(lcurve)*8;
} else {
gnutls_pk_params_st params;
gnutls_pk_params_init(¶ms);
result = _gnutls_get_asn_mpis(src, src_name, ¶ms);
if (result < 0)
return gnutls_assert_val(result);
bits[0] = pubkey_to_bits(¶ms);
gnutls_pk_params_release(¶ms);
}
return algo;
}
/* Reads the DER signed data from the certificate and allocates space and
* returns them into signed_data.
*/
int
_gnutls_x509_get_signed_data(ASN1_TYPE src, const gnutls_datum_t *der,
const char *src_name,
gnutls_datum_t * signed_data)
{
int start, end, result;
if (der == NULL || der->size == 0) {
return _gnutls_x509_der_encode(src, src_name, signed_data, 0);
}
/* Get the signed data
*/
result = asn1_der_decoding_startEnd(src, der->data, der->size,
src_name, &start, &end);
if (result != ASN1_SUCCESS) {
result = _gnutls_asn2err(result);
gnutls_assert();
goto cleanup;
}
result =
_gnutls_set_datum(signed_data, &der->data[start],
end - start + 1);
if (result < 0) {
gnutls_assert();
goto cleanup;
}
result = 0;
cleanup:
return result;
}
/*-
* gnutls_x509_get_signature_algorithm:
* @src: should contain an ASN1_TYPE structure
* @src_name: the description of the signature field
*
* This function will return a value of the #gnutls_sign_algorithm_t
* enumeration that is the signature algorithm that has been used to
* sign this certificate.
*
* Returns: a #gnutls_sign_algorithm_t value, or a negative error code on
* error.
-*/
int
_gnutls_x509_get_signature_algorithm(ASN1_TYPE src, const char *src_name)
{
int result;
char name[128];
gnutls_datum_t sa = {NULL, 0};
_gnutls_str_cpy(name, sizeof(name), src_name);
_gnutls_str_cat(name, sizeof(name), ".algorithm");
/* Read the signature algorithm */
result = _gnutls_x509_read_value(src, name, &sa);
if (result < 0) {
gnutls_assert();
return result;
}
/* Read the signature parameters. Unless the algorithm is
* RSA-PSS, parameters are not read. They will be read from
* the issuer's certificate if needed.
*/
if (sa.data && strcmp ((char *) sa.data, PK_PKIX1_RSA_PSS_OID) == 0) {
gnutls_datum_t der = {NULL, 0};
gnutls_x509_spki_st params;
_gnutls_str_cpy(name, sizeof(name), src_name);
_gnutls_str_cat(name, sizeof(name), ".parameters");
result = _gnutls_x509_read_value(src, name, &der);
if (result < 0) {
_gnutls_free_datum(&sa);
return gnutls_assert_val(result);
}
result = _gnutls_x509_read_rsa_pss_params(der.data, der.size,
¶ms);
_gnutls_free_datum(&der);
if (result == 0)
result = gnutls_pk_to_sign(params.pk, params.rsa_pss_dig);
} else if (sa.data) {
result = gnutls_oid_to_sign((char *) sa.data);
} else {
result = GNUTLS_E_UNKNOWN_ALGORITHM;
}
_gnutls_free_datum(&sa);
if (result == GNUTLS_SIGN_UNKNOWN)
result = GNUTLS_E_UNKNOWN_ALGORITHM;
return result;
}
/* Reads the DER signature from the certificate and allocates space and
* returns them into signed_data.
*/
int
_gnutls_x509_get_signature(ASN1_TYPE src, const char *src_name,
gnutls_datum_t * signature)
{
int result, len;
int bits;
signature->data = NULL;
signature->size = 0;
/* Read the signature
*/
len = 0;
result = asn1_read_value(src, src_name, NULL, &len);
if (result != ASN1_MEM_ERROR) {
result = _gnutls_asn2err(result);
gnutls_assert();
goto cleanup;
}
bits = len;
if (bits % 8 != 0 || bits < 8) {
gnutls_assert();
result = GNUTLS_E_CERTIFICATE_ERROR;
goto cleanup;
}
len = bits / 8;
signature->data = gnutls_malloc(len);
if (signature->data == NULL) {
gnutls_assert();
result = GNUTLS_E_MEMORY_ERROR;
return result;
}
/* read the bit string of the signature
*/
bits = len;
result =
asn1_read_value(src, src_name, signature->data, &bits);
if (result != ASN1_SUCCESS) {
result = _gnutls_asn2err(result);
gnutls_assert();
goto cleanup;
}
signature->size = len;
return 0;
cleanup:
gnutls_free(signature->data);
return result;
}
/* ASN.1 PrintableString rules */
static int is_printable(char p)
{
if ((p >= 'a' && p <= 'z') || (p >= 'A' && p <= 'Z') ||
(p >= '0' && p <= '9') || p == ' ' || p == '(' || p == ')' ||
p == '+' || p == ',' || p == '-' || p == '.' || p == '/' ||
p == ':' || p == '=' || p == '?')
return 1;
return 0;
}
static int write_complex_string(ASN1_TYPE asn_struct, const char *where,
const struct oid_to_string *oentry,
const uint8_t * data, size_t data_size)
{
char tmp[128];
ASN1_TYPE c2;
int result;
const char *string_type;
unsigned int i;
result =
asn1_create_element(_gnutls_get_pkix(), oentry->asn_desc, &c2);
if (result != ASN1_SUCCESS) {
gnutls_assert();
return _gnutls_asn2err(result);
}
tmp[0] = 0;
string_type = "printableString";
/* Check if the data is ASN.1 printable, and use
* the UTF8 string type if not.
*/
for (i = 0; i < data_size; i++) {
if (!is_printable(data[i])) {
string_type = "utf8String";
break;
}
}
/* if the type is a CHOICE then write the
* type we'll use.
*/
result = asn1_write_value(c2, "", string_type, 1);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto error;
}
_gnutls_str_cpy(tmp, sizeof(tmp), string_type);
result = asn1_write_value(c2, tmp, data, data_size);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto error;
}
result =
_gnutls_x509_der_encode_and_copy(c2, "", asn_struct, where, 0);
if (result < 0) {
gnutls_assert();
goto error;
}
result = 0;
error:
asn1_delete_structure(&c2);
return result;
}
/* This will encode and write the AttributeTypeAndValue field.
* 'multi' must be (0) if writing an AttributeTypeAndValue, and 1 if Attribute.
* In all cases only one value is written.
*/
int
_gnutls_x509_encode_and_write_attribute(const char *given_oid,
ASN1_TYPE asn1_struct,
const char *where,
const void *_data,
int data_size, int multi)
{
const uint8_t *data = _data;
char tmp[128];
int result;
const struct oid_to_string *oentry;
oentry = _gnutls_oid_get_entry(_oid2str, given_oid);
if (oentry == NULL) {
gnutls_assert();
_gnutls_debug_log("Cannot find OID: %s\n", given_oid);
return GNUTLS_E_X509_UNSUPPORTED_OID;
}
/* write the data (value)
*/
_gnutls_str_cpy(tmp, sizeof(tmp), where);
_gnutls_str_cat(tmp, sizeof(tmp), ".value");
if (multi != 0) { /* if not writing an AttributeTypeAndValue, but an Attribute */
_gnutls_str_cat(tmp, sizeof(tmp), "s"); /* values */
result = asn1_write_value(asn1_struct, tmp, "NEW", 1);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto error;
}
_gnutls_str_cat(tmp, sizeof(tmp), ".?LAST");
}
if (oentry->asn_desc != NULL) { /* write a complex string API */
result =
write_complex_string(asn1_struct, tmp, oentry, data,
data_size);
if (result < 0)
return gnutls_assert_val(result);
} else { /* write a simple string */
gnutls_datum_t td;
td.data = (void *) data;
td.size = data_size;
result =
_gnutls_x509_write_string(asn1_struct, tmp, &td,
oentry->etype);
if (result < 0) {
gnutls_assert();
goto error;
}
}
/* write the type
*/
_gnutls_str_cpy(tmp, sizeof(tmp), where);
_gnutls_str_cat(tmp, sizeof(tmp), ".type");
result = asn1_write_value(asn1_struct, tmp, given_oid, 1);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto error;
}
result = 0;
error:
return result;
}
/* copies a datum to a buffer. If it doesn't fit it returns
* GNUTLS_E_SHORT_MEMORY_BUFFER. It always deinitializes the datum
* after the copy.
*
* The buffer will always be null terminated.
*/
int _gnutls_strdatum_to_buf(gnutls_datum_t * d, void *buf,
size_t * buf_size)
{
int ret;
uint8_t *_buf = buf;
if (buf == NULL || *buf_size < d->size + 1) {
*buf_size = d->size + 1;
ret = gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
goto cleanup;
}
memcpy(buf, d->data, d->size);
_buf[d->size] = 0;
*buf_size = d->size;
ret = 0;
cleanup:
_gnutls_free_datum(d);
return ret;
}
int
_gnutls_x509_get_raw_field2(ASN1_TYPE c2, const gnutls_datum_t * raw,
const char *whom, gnutls_datum_t * dn)
{
int result, len1;
int start1, end1;
result =
asn1_der_decoding_startEnd(c2, raw->data, raw->size,
whom, &start1, &end1);
if (result != ASN1_SUCCESS) {
gnutls_assert();
result = _gnutls_asn2err(result);
goto cleanup;
}
len1 = end1 - start1 + 1;
dn->data = &raw->data[start1];
dn->size = len1;
result = 0;
cleanup:
return result;
}
int _gnutls_copy_string(const gnutls_datum_t* str, uint8_t *out, size_t *out_size)
{
unsigned size_to_check;
size_to_check = str->size + 1;
if ((unsigned) size_to_check > *out_size) {
gnutls_assert();
(*out_size) = size_to_check;
return GNUTLS_E_SHORT_MEMORY_BUFFER;
}
if (out != NULL && str->data != NULL) {
memcpy(out, str->data, str->size);
out[str->size] = 0;
} else if (out != NULL) {
out[0] = 0;
}
*out_size = str->size;
return 0;
}
int _gnutls_copy_data(const gnutls_datum_t* str, uint8_t *out, size_t *out_size)
{
if ((unsigned) str->size > *out_size) {
gnutls_assert();
(*out_size) = str->size;
return GNUTLS_E_SHORT_MEMORY_BUFFER;
}
if (out != NULL && str->data != NULL) {
memcpy(out, str->data, str->size);
}
*out_size = str->size;
return 0;
}
/* Converts an X.509 certificate to subjectPublicKeyInfo */
int x509_crt_to_raw_pubkey(gnutls_x509_crt_t crt,
gnutls_datum_t * rpubkey)
{
gnutls_pubkey_t pubkey = NULL;
int ret;
ret = gnutls_pubkey_init(&pubkey);
if (ret < 0)
return gnutls_assert_val(ret);
ret = gnutls_pubkey_import_x509(pubkey, crt, 0);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret =
gnutls_pubkey_export2(pubkey, GNUTLS_X509_FMT_DER, rpubkey);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = 0;
cleanup:
gnutls_pubkey_deinit(pubkey);
return ret;
}
/* Converts an X.509 certificate to subjectPublicKeyInfo */
int _gnutls_x509_raw_crt_to_raw_pubkey(const gnutls_datum_t * cert,
gnutls_datum_t * rpubkey)
{
gnutls_x509_crt_t crt = NULL;
int ret;
ret = gnutls_x509_crt_init(&crt);
if (ret < 0)
return gnutls_assert_val(ret);
ret = gnutls_x509_crt_import(crt, cert, GNUTLS_X509_FMT_DER);
if (ret < 0) {
gnutls_assert();
goto cleanup;
}
ret = x509_crt_to_raw_pubkey(crt, rpubkey);
cleanup:
gnutls_x509_crt_deinit(crt);
return ret;
}
unsigned
_gnutls_check_valid_key_id(const gnutls_datum_t *key_id,
gnutls_x509_crt_t cert, time_t now,
unsigned *has_ski)
{
uint8_t id[MAX_KEY_ID_SIZE];
size_t id_size;
unsigned result = 0;
if (has_ski)
*has_ski = 0;
if (now > gnutls_x509_crt_get_expiration_time(cert) ||
now < gnutls_x509_crt_get_activation_time(cert)) {
/* don't bother, certificate is not yet activated or expired */
gnutls_assert();
goto out;
}
id_size = sizeof(id);
if (gnutls_x509_crt_get_subject_key_id(cert, id, &id_size, NULL) < 0) {
gnutls_assert();
goto out;
}
if (has_ski)
*has_ski = 1;
if (id_size == key_id->size && !memcmp(id, key_id->data, id_size))
result = 1;
out:
return result;
}
/* Takes a certificate list and orders it with subject, issuer order.
*
* *clist_size contains the size of the ordered list (which is always less or
* equal to the original).
* @func: the function to call to elements outside the sort.
*
* This function is intentionally kept simple to be easily verified
* so that it can be used with untrusted chains. The introduction
* of the func parameter added significant complexity in that aspect.
* If more demanding use-cases need to be handled, consider splitting
* that function.
*
* Returns the sorted list which may be the original clist.
*
*/
gnutls_x509_crt_t *_gnutls_sort_clist(gnutls_x509_crt_t
sorted[DEFAULT_MAX_VERIFY_DEPTH],
gnutls_x509_crt_t *clist,
unsigned int *clist_size,
gnutls_cert_vfunc func)
{
int prev;
unsigned int j, i;
int issuer[DEFAULT_MAX_VERIFY_DEPTH]; /* contain the index of the issuers */
bool insorted[DEFAULT_MAX_VERIFY_DEPTH]; /* non zero if clist[i] used in sorted list */
unsigned orig_size = *clist_size;
/* Do not bother sorting if too many certificates are given.
* Prevent any DoS attacks.
*/
if (*clist_size > DEFAULT_MAX_VERIFY_DEPTH)
return clist;
for (i = 0; i < DEFAULT_MAX_VERIFY_DEPTH; i++) {
issuer[i] = -1;
insorted[i] = 0;
}
/* Find the issuer of each certificate and store it
* in issuer array. O(n^2) so consider that before
* increasing DEFAULT_MAX_VERIFY_DEPTH.
*/
for (i = 0; i < *clist_size; i++) {
for (j = 1; j < *clist_size; j++) {
if (i == j)
continue;
if (gnutls_x509_crt_check_issuer(clist[i],
clist[j]) != 0) {
issuer[i] = j;
break;
}
}
}
/* the first element is always included */
sorted[0] = clist[0];
insorted[0] = 1;
if (issuer[0] == -1) {
*clist_size = 1;
goto exit;
}
prev = 0;
for (i = 1; i < *clist_size; i++) {
prev = issuer[prev];
if (prev < 0) { /* no issuer */
*clist_size = i;
break;
}
sorted[i] = clist[prev];
insorted[prev] = 1;
}
exit:
if (func) {
/* call func() on all the elements that were
* not used in the sorted list */
for (i = 1; i < orig_size; i++) {
if (insorted[i] == 0) {
func(clist[i]);
}
}
}
return sorted;
}
int _gnutls_check_if_sorted(gnutls_x509_crt_t * crt, int nr)
{
int i, ret;
/* check if the X.509 list is ordered */
if (nr > 1) {
for (i = 0; i < nr; i++) {
if (i > 0) {
if (!_gnutls_x509_compare_raw_dn(&crt[i]->raw_dn,
&crt[i-1]->raw_issuer_dn)) {
ret =
gnutls_assert_val
(GNUTLS_E_CERTIFICATE_LIST_UNSORTED);
goto cleanup;
}
}
}
}
ret = 0;
cleanup:
return ret;
}
/**
* gnutls_gost_paramset_get_name:
* @param: is a GOST 28147 param set
*
* Convert a #gnutls_gost_paramset_t value to a string.
*
* Returns: a string that contains the name of the specified GOST param set,
* or %NULL.
*
* Since: 3.6.3
**/
const char *gnutls_gost_paramset_get_name(gnutls_gost_paramset_t param)
{
switch(param) {
case GNUTLS_GOST_PARAMSET_TC26_Z:
return "TC26-Z";
case GNUTLS_GOST_PARAMSET_CP_A:
return "CryptoPro-A";
case GNUTLS_GOST_PARAMSET_CP_B:
return "CryptoPro-B";
case GNUTLS_GOST_PARAMSET_CP_C:
return "CryptoPro-C";
case GNUTLS_GOST_PARAMSET_CP_D:
return "CryptoPro-D";
default:
gnutls_assert();
return "Unknown";
}
}
/**
* gnutls_gost_paramset_get_oid:
* @param: is a GOST 28147 param set
*
* Convert a #gnutls_gost_paramset_t value to its object identifier.
*
* Returns: a string that contains the object identifier of the specified GOST
* param set, or %NULL.
*
* Since: 3.6.3
**/
const char *gnutls_gost_paramset_get_oid(gnutls_gost_paramset_t param)
{
switch(param) {
case GNUTLS_GOST_PARAMSET_TC26_Z:
return GOST28147_89_TC26Z_OID;
case GNUTLS_GOST_PARAMSET_CP_A:
return GOST28147_89_CPA_OID;
case GNUTLS_GOST_PARAMSET_CP_B:
return GOST28147_89_CPB_OID;
case GNUTLS_GOST_PARAMSET_CP_C:
return GOST28147_89_CPC_OID;
case GNUTLS_GOST_PARAMSET_CP_D:
return GOST28147_89_CPD_OID;
default:
gnutls_assert();
return NULL;
}
}
/**
* gnutls_oid_to_gost_paramset:
* @oid: is an object identifier
*
* Converts a textual object identifier to a #gnutls_gost_paramset_t value.
*
* Returns: a #gnutls_gost_paramset_get_oid of the specified GOST 28147
* param st, or %GNUTLS_GOST_PARAMSET_UNKNOWN on failure.
*
* Since: 3.6.3
**/
gnutls_gost_paramset_t gnutls_oid_to_gost_paramset(const char *oid)
{
if (!strcmp(oid, GOST28147_89_TC26Z_OID))
return GNUTLS_GOST_PARAMSET_TC26_Z;
else if (!strcmp(oid, GOST28147_89_CPA_OID))
return GNUTLS_GOST_PARAMSET_CP_A;
else if (!strcmp(oid, GOST28147_89_CPB_OID))
return GNUTLS_GOST_PARAMSET_CP_B;
else if (!strcmp(oid, GOST28147_89_CPC_OID))
return GNUTLS_GOST_PARAMSET_CP_C;
else if (!strcmp(oid, GOST28147_89_CPD_OID))
return GNUTLS_GOST_PARAMSET_CP_D;
else
return gnutls_assert_val(GNUTLS_GOST_PARAMSET_UNKNOWN);
}
int _gnutls_x509_get_version(ASN1_TYPE root, const char *name)
{
uint8_t version[8];
int len, result;
len = sizeof(version);
result = asn1_read_value(root, name, version, &len);
if (result != ASN1_SUCCESS) {
if (result == ASN1_ELEMENT_NOT_FOUND)
return 1; /* the DEFAULT version */
gnutls_assert();
return _gnutls_asn2err(result);
}
if (len != 1 || version[0] >= 0x80)
return gnutls_assert_val(GNUTLS_E_ASN1_DER_ERROR);
return (int) version[0] + 1;
}